Usually once I find a media report and start a thread all sorts of info comes out but there is a stigma associated to having a fatality or serious injury that most in the sport want to cover up since they feel that talking "bad" about their friend that is dead or injured is wrong.

And the reason that people don't submit reports is because the "talking bad" occurs even when it's not justified. Since that activity is allowed here, that's what makes people reticent to post anything, because they know what the inevitable responses will be. If the forum was operated with higher ethical standards where speculation and unjustified bashing was squelched, then more people would be willing to come forward. And that's why it is the way it is.